Koopman Hardware family sells land to storage business for $6.6M

The family behind Koopman Lumber & Hardware has sold part of its Grafton property and a Whitinsville site for a combined $6.6 million to a national storage facility firm based in New York.

The Grafton property, which sold for $3 million, includes Grafton Self Storage but not the main retail building with Koopman Lumber & Hardware, Wolfpack Vapor and other businesses along Route 122. The Whitinsville property, which also houses a storage facility, sold for $3.6 million.

An entity owned by members of the Koopman family -- Donald Koopman, Dirk Koopman and Denise Brookhouse -- sold the sites to an entity connected to Prime Group Holdings of Saratoga Springs, N.Y. Prime Group Holdings owns 17 self-storage sites in Massachusetts, along with others in more than 20 other states, according to its website.

The sale of the Grafton site, which closed July 18, includes roughly half of the 15-acre site at 82 Worcester St, according to Massachusetts land records. The entire property was last assessed by the town at more than $6.7 million.

The self-storage business on the Grafton site was also sold, for an undisclosed amount.

The Whitinsville site off Douglas Road, which closed July 17, has been approved by the Northbridge Planning Board for eight self-storage buildings. The Koopman family opened Northbridge Self Storage one year ago but have since sold the business for an undisclosed amount.

Donald Koopman is the son of founder Peter Koopman, and Denise is Peter's granddaughter. Denise, her husband Anthony, and her brother Dirk run Koopman Lumber & Hardware together today, according to the company website.

Koopman Lumber & Hardware has grown over the decades to include seven locations: Andover, Grafton, Hudson, Milford, Sharon, Uxbridge and Whitinsville. The company has two distribution centers in Uxbridge and Sutton.

CORRECTION: A previous version of this story incorrectly said the Koopman family sold the site of Koopman Hardware & Lumber store in Grafton. Part of that property was sold, but not the section with the hardware store. The story also incorrectly left out Dirk Koopman as a owner of the company selling the property, and incorrectly listed Whitinsville as a location of a Koopman distribution center.